Eotech
The HWS is actively in use with military forces around the globe, including many special operations forces, like USSOCOM, where it is standard for close quarter, urban combat. Military units like Stryker Brigade, 10th Mountain and 3rd Infantry have chosen the holographic weapon sight as its optic of choice. It is battle proven to withstand the abuse that any harsh environment, high powered weapon platform, or military mission can dish out.
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A lost or stolen NFA firearm
A lost or stolen NFA firearm can be a real problem. It can be a very expensive loss, as well as endangering the continued lawfulness of owning NFA firearms, both at a state and federal level. Contrary to what you might hear, NFA firearms, machine guns and silencers in particular, are very rare in crime. A significant source of such weapons in crime is stolen NFA firearms, from law enforcement, the military and civilian collectors. A crime spree with a stolen NFA firearm can lead to restrictive state or local legislation, as well as local law enforcement refusing to continue providing the law enforcement certification needed for transfers to individuals. Safeguarding NFA firearms is not required, but seems to me to be extremely prudent, both to preserve the firearm, as well as its continued legal ownership. Reporting the theft of an NFA weapon to law enforcement is the only way to even have a chance at recovering the gun, and preventing its use (or further use) in crime. I think reporting its theft is a good idea. Below is what is required, as opposed to what is a good idea.